The analysis of airworthiness standards and general specifications shows that only guiding principles such as "use magnesium alloy as little as possible" have been issued at the present for the use of Mg-alloys in airplane engines at home and abroad, but the specific restrictions that should meet, especially the protective schemes that must be adopted in marine environments, are not been clearly specified yet. In view of the insufficient data related with the corrosion performance and protection technology of Mg-alloys for airplane engines, therefore, it is difficult to effectively support the selection of Mg-alloy materials and processes, as well as the assessment of their adaptability to marine environment. In response to the problem, it is suggested to establish an equivalent environmental spectrum for laboratory accelerated testing to facilitate the evaluation of typical Mg-alloy protection processes via laboratory accelerated test, by taking the harshest corrosion environment that Mg-alloy structures may encountered during service fully into account. Meanwhile, natural environmental corrosion testing should be carried out to determine the relevant corrosion protection performance. In addition, it is necessary to acquire how the corrosion degree of Mg-alloy substrate accumulates over time when the protective coating is damaged, then make a comparison with the corrosion performance of Al-alloys in the actual service condition of aircraft engines so that to put forward the evaluation criteria of Mg-alloys. Last but not least, the corrosion performance of the coupling structures of Mg-alloy with dissimilar materials should be assessed via accelerated laboratory tests in order to verify the environmental adaptability of such typical structures.